Welcome to the Family!!First, what kind of tank are you wanting to do- fish only? Fish only with live rock? full reef? The show Tanked only does Fish Only tanks. That's why they get away with throwing everything together and walking away,but they don't, they have to come back and do water changes until the tank cycles.Now for your question. It completely depends on what your answer to my question is. Different style tanks have different requirements but all have to cycle to work. The way it works is like this-1. You feed your fish, they miss some, they poop in the water. This all breaks down into Amonia. Bacteria breaks the Amonia down into Nitrites.2. Nitrites while not as lethal as Amonia, will still do harm. Another type of bacteria breaks Nitrites into Nitrates.3. Nitrates are food for plants,in other words, algea. The fish eat the algea.This is what is known as a cycle. It can take up to 30 days to get a cycle started.That is a general description-I hope this has helped. I can give a more detailed answer when you answer my question.Jim